JPH01297239A - Take-up liner for unvulcanized rubber member - Google Patents

Abstract

PURPOSE:To obtain an excellent take-up liner showing no lowering in the tackiness of an unvulcanized rubber member, by bonding an elastomer layer having elongation, elasticity and a smooth surface to both surfaces or single surface of long strip like base cloth having extensibility. CONSTITUTION:As base cloth, a fabric or knitted fabric composed of an org. fiber having extensibility, a fabric having extensibility or cloth having a knitted fabric structure is used and this cloth prevents the generation of wrinkles in a liner even when the difference in a tensile degree is generated in the width direction of the liner by meandering at the time of taking-up and the thickness difference of a rubber member and, further, since said base cloth is uniformly brought into contact with the rubber member even when there is thickness difference in the rubber member, the tackiness of the rubber member can be improved. The elastomer layer 2 bonded to both surfaces or single surface of the base cloth 1 has a smooth surface so as not to form unevenness to the surface of the rubber member when said layer is taken up in the contact state with an unvulcanized rubber member and, since a rubber surface is sealed with the elastomer layer, the generation of bloom in the rubber member is inhibited and the lowering in the tackiness of the rubber member can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a winding liner used for winding up tire unvulcanized rubber members, such as inner liners, cochoid cords, and the like.

(Prior Art) An unvulcanized rubber member may be temporarily stored between the step of supplying the unvulcanized rubber member and the step of using it. As a method for temporary storage, it is common to wind up the unvulcanized rubber member between winding liners and temporarily store it in the form of a winding proboscis.

Initially, woven fabrics of organic fibers such as nylon, polyester, vinylon, polypropylene, etc. were used as liner materials for winding relatively thin, flat unvulcanized rubber members. However, when the liner material is wound up, unevenness of the threads of the liner is formed on the rubber surface, resulting in a decrease in the tackiness of the rubber member and a change in tackiness at the winding position. problems such as decreased work efficiency, air intrusion between joints due to insufficient joining strength of parts in manufactured tires, joint cracks in inner liners, which cause product defects, and problems such as unnecessary waste of direct material costs such as cement rubber application. was there. Therefore, disposable sheets of polyethylene, polypropylene, vinyl chloride, etc., and reusable liners, which are made of a sheet of non-elastic elastomer bonded to a non-stretchable base fabric, are currently in use.

On the other hand, a contoured rubber sheet 20 as shown in FIG.
When winding up an unvulcanized rubber member with different rubber thicknesses in the width direction, such as a cut coachoid cord 23 with a squeegee rubber 22 as shown in FIG. A winding material covered with cloth was used. However, such a winding material has a problem in that wrinkles occur on the surface of the winding material, leaving wrinkle marks on the unvulcanized rubber member. In addition, since the soft foam is thin, when an unvulcanized rubber member with contours is rolled up, the member does not come into uniform contact with the rolled material, and the member is crushed in local concentrated contact areas, resulting in a reduction in the rubber thickness. The shrinkage rate in the width direction changes during storage, and when unrolled during the usage process,
As shown in FIG. 17, there was also the problem that the product had a bent shape (short side), resulting in a defective product. In response, the present inventors have improved such a winding material so that it contacts uniformly with the contoured unvulcanized rubber member, and locally concentrated contact causes the member to be crushed and change in thickness. We have previously filed a patent application for the technology that prevents the
282000).

(Problems to be Solved by the Invention) First, however, the above-mentioned winding liner currently used for relatively thin and flat unvulcanized rubber has the following problems.

When a film made of nylon, polyester, vinyl chloride, polypropylene, etc. is used as a winding liner, the tackiness of the rubber member is improved, but it is disposable, making it uneconomical, and the film is weak, making it difficult to unwind by forming. There are many problems in practical use, such as the sheet being easily cut, resulting in poor peeling performance between the rubber and the liner, and a significant drop in work efficiency.

In addition, a take-up liner that improves the drawbacks of such take-up liners is a take-up liner in which a non-stretchable elastomer is bonded to either one or both sides of a base fabric made of a woven organic fiber with low elasticity. Therefore, when the liner is rolled up, even a slight meandering will cause the liner to be pulled in a different way in the width direction, and the loosened part will be wrinkled and rolled up. This has the problem that it digs into the surface and produces defective products with poor properties. As a way to improve this, lowering the strength of the liner to make it easier to stretch is effective at the initial stage of use, but as the liner is used, the stress relaxes and the liner becomes sagging, making it unusable, so it is not a sufficient solution. This is the actual situation. Furthermore, when such a winding liner is used to wind up rubber members having different thicknesses in the width direction, such as rubber sheets with contours or cut coachoid cords with squeegee rubber, the winding diameter in the width direction changes. In areas where the rubber is thick, the winding diameter increases and the liner tends to be stretched, while in areas where the rubber is thin, the liner becomes slack, creating an imbalance in the way the liner is pulled in the width direction and causing wrinkles in the liner. In addition, since the surface of the thin portion of the rubber member is not sealed with the liner, there is a problem in that the tankiness of the rubber member decreases due to blooming.

Next, conventional winding liners used when winding up unvulcanized rubber members having different thicknesses in the width direction have the following problems.

With conventional take-up liners, when an unvulcanized rubber member is rolled up and temporarily stored, the member is crushed under its own weight, and the threads of the plain fiber or knitted material of the take-up liner dig into the surface of the member, forming unevenness. As a result, the tackiness of the rubber member is significantly reduced, and the winding position (outside, inside, core)
Since the amount of unevenness formed in the threads differs, variations in tackiness occur within the winding.

Therefore, when assembling such an unvulcanized rubber member by bonding it with other members in the tire molding process, the low tackiness of the rubber member results in a weak holding force at the joint, which can significantly impair work performance during tire molding. In addition, product defects such as air entering between joints and incorrect positioning of components occur.Furthermore, due to the weak holding force of dual tuba (DT) side components to the end of the top tread component, the bonding interface There were also problems such as DT cracking occurring in the product due to the external precure cement getting caught in the product. Until now,
As a countermeasure to the problem caused by the reduced tackiness of the rubber member, rubber cement has been applied to the unvulcanized rubber member before winding, or a film of nylon or the like has been used as the winding sheet, but these methods are difficult to solve. The problem is that no satisfactory take-up liner has been available to date.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of conventional take-up liners and to provide an excellent take-up liner that does not cause a decrease in the tackiness of an unvulcanized rubber member.

(Means for Solving the Problems) As a result of intensive studies to solve the above problems, the present inventors have developed a relatively thin and flat unvulcanized rubber member, and an unvulcanized rubber member with different thicknesses in the width direction. It has been found that when winding up a member, the above-mentioned problems can be solved by making each winding member have the following configuration.

That is, the first feature of the present invention is that, in a take-up liner for winding up an unvulcanized rubber member, a stretchable and elastic elastomer with a smooth surface is coated on both sides or one side of a long strip-shaped base fabric that has stretchability. The present invention relates to a roll-up liner with bonded layers.

The second aspect of the present invention is a laminate in which a stretchable elastomer layer is bonded to both or one side of a long strip-shaped soft foam in a take-up liner that is wound around an unvulcanized rubber member. The present invention relates to a winding liner of an unvulcanized rubber member, in which at least one surface of the laminate has a smooth surface.

First, the first winding liner of the present invention, which is suitable for winding up a flat unvulcanized rubber member, will be specifically described. An example of this take-up liner is shown in FIG.

The base fabric 1 used in the present invention is a woven or knitted fabric made of stretchable organic fibers, such as urethane fibers, or a woven or knitted structure, such as tricot fabric, that has stretchability. This base fabric 1 has the role of reinforcing the liner, and also has elasticity even if there is a difference in the degree of tension in the width direction of the inner and inner parts due to meandering during winding and differences in the thickness of the rubber member. This prevents wrinkles from forming on the liner, and even when the rubber material has a difference in thickness, such as a pre-cut coachoid cord with a squeegee rubber, it makes uniform contact with the rubber material, improving the tackiness of the rubber material. be able to.

Note that the stretchability of the base fabric is preferably small (5% or more in both cases) in order to achieve this effect.

Next, the elastomer layer 2 bonded to both sides or one side of the base fabric 1 has a smooth surface so that unevenness will not be formed on the surface of the rubber member when it is rolled up in contact with an unvulcanized rubber member. . As a result, the rubber surface is sealed with the elastomer layer, thereby preventing the rubber member from blooming and preventing the tackiness of the rubber member from decreasing. Furthermore, by using a material that has elasticity and extensibility for the elastomer layer 2, even if the degree of tension of the liner in the width direction changes, it follows this together with the base fabric 1 and prevents the generation of wrinkles in the liner. Even if there is a difference in the thickness of the member, it contacts uniformly and plays an important role in improving the tackiness of the rubber member.

In addition, when improving the tackiness of both sides of the unvulcanized rubber member to be wound up, the elastomer layer 2 is provided on both sides of the base fabric l, while when improving only one side, the elastomer layer 2 is provided on only one side of the base fabric l. 2 may be provided.

Examples of materials for the elastomer layer that can be used in the present invention include silicone rubber, nitrile rubber (NBR),
Butyl rubber (IIR), chloroprene rubber (CR), styrene-butadiene copolymer rubber (SBR), natural rubber (NR), isoprene rubber (IR), ethylene-propylene rubber (EPM), fluororubber, butadiene rubber (
BR), ethylene propylene diene terpolymer rubber (
EPDM), acrylic rubber (ACM), chlorosulfonated polyethylene (C3M), polysulfide rubber, urethane rubber, and the like. Silicone rubber is preferred from the standpoint of good releasability from unvulcanized rubber members, but since silicone rubber is expensive, the elastomer layer may have a two-layer structure in which only the outermost layer is made of silicone rubber.

Note that a thickness of about 1 mm is sufficient for the elastomer layer.

Specific examples of suitable wind-up liners of the present invention comprising the above-mentioned base fabric and elastomer layer are as follows.

1) A winding liner made of a stretchable polyester tricot cloth as a base fabric and stretchable elastic silicone rubber bonded to both sides using an adhesive.The silicone rubber can be either a thermosetting type or a natural curing type. However, from the viewpoint of workability, it is preferable that the friction coefficient (μ) is small.

2) A winding liner made of a stretchable urethane fiber fabric as a base fabric and stretchable silicone rubber bonded to both sides using an adhesive.3) A stretchable urethane fiber fabric or polyester tricot. A roll-up liner made of cloth as a base fabric and urethane rubber bonded to both sides using an adhesive 4) A stretchable urethane fiber fabric or polyester tricot fabric is used as a base fabric, and fluororubber is bonded to both sides of the fabric with an adhesive. 5) A take-up liner made of a stretchable urethane fiber fabric or polyester tricot cloth as a base fabric, and nitrile rubber bonded to both sides of the base fabric using an adhesive.6) A take-up liner made of stretchable urethane fibers. A roll-up liner made of woven fabric or polyester tricot cloth as the base fabric, nitrile rubber bonded to both sides, and silicone rubber bonded on top of that 7) Stretchable urethane fiber fabric or polyester tricot fabric as the base fabric , urethane rubber is bonded to both sides of the liner, and silicone rubber is bonded to the liner 8) A stretchable urethane fiber fabric or polyester tricot cloth is used as a base fabric, and nitrile rubber is bonded to both sides of the liner. Further, a winding liner with fluororubber bonded thereon9) A winding liner with a stretchable urethane fiber fabric or polyester tricot cloth as a base fabric, urethane rubber bonded to both sides of the base fabric, and fluorine rubber bonded on top of that. Take-up liner 10) A winding liner made of a stretchable urethane fiber fabric or polyester tricot cloth as a base fabric, silicone rubber with good adhesion bonded to both sides, and silicone rubber with a small coefficient of friction bonded on top of this. Liner' - In each of the winding liners shown in 1) to 10) above, the elastomer layer may be provided only on one side of the base fabric.

Next, a second winding liner of the present invention suitable for winding up unvulcanized rubber members having different thicknesses in the width direction will be specifically described.

When winding up a rubber member having different thicknesses in the width direction, such as an unvulcanized rubber member with a contour, such a winding liner completely wraps the convex portion of the thickness difference in the width direction of the rubber member inside. It has a soft foam having a predetermined thickness so that it can be rolled into a roll with no difference in outer diameter in the width direction. The thickness of the liner to be rolled up depends on the rubber member to be rolled up, but is generally within the range of 4 to 12 mm, preferably equal to or greater than the rubber member to be rolled up, and the thickness of the liner that can be used most frequently is about 5 mm. .

The second take-up liner of the present invention includes the following three
It can be classified into two types.

- Long Ajitsu ■ A soft foam of a predetermined thickness is adhered to the entire surface of both sides of a highly rigid non-stretchable reinforcing cloth, and on each outer surface of both soft foams, (1-1): On both sides. Winding liner (1-2) bonded with a film-like elastomer with stretchability or a film-like elastomer with stretchability that is a combination of ■stretchable cloth and 1. (2-1) for each outer surface of a soft foam of a predetermined thickness with a take-up liner or cup with a stretchable cloth bonded to the other side as an elastomer layer.
: Winding liner (2-2) with the film-like elastomer of the above ■ or ■ bonded on both sides: The film-like elastomer of the above ■ or ■ is bonded on one side, and a stretchable elastomer layer is formed on the other side. (3-1) for each outer surface of the soft foam with a predetermined thickness of 10% of the rolled liner cup with the cloth bonded to it.
: On one side, a stretchable cloth is glued as an elastomer layer, and on the other side, ■ non-stretchable highly rigid sheet or metal sheet, or ■ non-stretchable highly rigid cloth and the above (■) are combined. Take-up liner (3-2) with bonded sheets: One side is bonded with the film-like elastomer described in ■ or ■ above, and the other side is bonded with the film-like elastomer described in
Or a winding liner to which sheets of (2) are joined The elastomers (2) and (2) and the sheets (2) and (2) described above both have smooth surfaces.

These elastomers and sheets will be specifically explained below.

-1: Film-like elastomer This film-like elastomer may be the same as the rubber material of the elastomer layer used in the first take-up liner of the present invention, and particularly has good releasability from unvulcanized rubber members. NBR, ACM, C3M, fluororubber, and polysulfide rubber are preferred from the viewpoint of good oil resistance and chemical resistance against compounded chemicals, oil, etc. transferred from the rubber member.

From the viewpoint of preventing the occurrence of wrinkles in the winding liner, the above-mentioned rubber material having extensibility and high elasticity is preferable, but the object of the present invention can be sufficiently achieved if the rubber material has only extensibility. , e.g. polypropylene,
Polyester, 6-nylon, 6.6-nylon, polyethylene, vinyl chloride, etc. may be used.

Furthermore, the sheet-like elastomer can be used not only as a single material of the above-mentioned rubber material or plastic material but also as a composite material of these materials. Composite materials are advantageous in terms of improved adhesion and cost reduction.

The stretchable fabric may be a woven or knitted fabric using urethane fibers, similar to the fabric used as the base fabric in the first winding liner of the present invention described above. In such a woven fabric, the warp yarns may be made of urethane fibers, and the weft yarns may be made of other organic fibers. Alternatively, nylon, polyester,
It is also possible to use knitted fabrics such as polypropylene, vinylon, cotton, rayon, polyethylene, acrylic or polyvinyl chloride fibers, such as tricot or stockinette fabrics.

The raw yarn type of the organic fiber may be monofilament, multifilament, or spun yarn.

The film-like elastomer here is made by combining the above-mentioned stretchable cloth with the elastomer material (2) above to have a smooth surface.

Specifically, after coating the surface of a stretchable cloth with an elastomer material directly, or providing a urethane layer on the surface of the cloth to improve adhesion and prevent impregnation,
It may also be coated with an elastomeric material.

3: In order to obtain a highly rigid sheet with no elasticity, the rubber-plastic composite material mentioned in ① above can be used.To further increase the rigidity, It is preferable to use a thicker material and a plastic material that is inherently more rigid.

As the metal sheet, stainless steel alloy, aluminum, aluminum alloy, titanium, titanium alloy, copper, or copper alloy can be used.

A non-stretchable and highly rigid fabric can be obtained using the following warp and weft yarns.

The warp (longitudinal direction of the liner) is made of metal wire, nylon,
Among polyester, polypropylene, vinylon, polyethylene, acrylic, and polyvinyl chloride fibers, the raw yarn type is preferably monofilament yarn with high bending rigidity. Alternatively, a multifilament yarn or spun yarn may be used, which has increased stiffness by increasing the thickness of the yarn and increasing the number of stitches.

The weft yarn (liner width direction) can be metal wire, nylon, polyester, polypropylene, vinylon, cotton, rayon, polyethylene, acrylic, or polyvinyl chloride fiber, and the raw yarn type can be monofilament yarn, multifilament yarn, or spun yarn. .

A non-stretchable and highly rigid cloth made of such warp and weft yarns may be treated with dip resin to further increase its rigidity. The desired sheet can be obtained by combining such a cloth with the elastomer material described in (1) above to make the surface smooth.

The elastomers (1) and (2) and the sheets (2) and (2) may be bonded to the soft foam layer only at the portions that contact the unvulcanized rubber member, as shown in FIG.

Next, preferred examples of the winding liners of the above types (1) to (3) will be specifically described with reference to the drawings.

The take-up liner shown in Figure 3 is of the above type (1-1).
belongs to. In the figure, a highly rigid non-stretchable cloth 3 has a role as a reinforcing cloth.

Such a cloth can be the same as the non-stretchable and highly rigid cloth described in (1) above, and it is also possible to further increase the rigidity by subjecting this cloth to dip resin processing. A film-like elastomer 5 having the above extensibility (2) is bonded to both outer surfaces of the soft foam 4 by adhesive or heat fusion. A urethane layer may be provided between the flexible foam 4 and the film-like elastomer 5 to improve adhesion. Further, as the film-like elastomer 5, a film-like elastomer having stretchability that is a combination of the above-mentioned stretchable cloth (2) and (2) may be used.

The winding liner shown in Figure 4 is of the above type (1-2).
belongs to. This take-up liner is no different from the take-up liner shown in FIG. 3 except that one side of the take-up liner shown in FIG. 3 is replaced with a stretchable cloth 6 such as tricot.

The take-up liner shown in Figure 5 is of the above type (2-1).
belongs to. The configuration of this take-up liner is the same as that of the take-up liner shown in FIG. In the winding liner shown in FIG. 5, the film-like elastomer 5 described in (2) is bonded to both sides of the soft foam 4.

The winding liner shown in Figure 6 is of the above type (2-2).
belongs to. This take-up liner is no different from the take-up liner shown in FIG. 5 except that one side of the take-up liner shown in FIG. 5 is replaced with a stretchable cloth 6.

The winding liner shown in Figure 7 is of the above type (3-1).
belongs to. This take-up liner is made of soft foam 4
The film-like elastomer (1) or (2) is bonded to one side of the sheet, and the non-stretchable and highly rigid sheet 7 (2) or (3) is bonded to the other side.

The winding liner shown in Figure 8 is of the above type (3-2).
belongs to. This take-up liner is no different from the take-up liner shown in FIG. 7 except that a stretchable cloth 6 is bonded therein instead of the film-like elastomer 5 of the take-up liner shown in FIG.

(Function) The first winding liner of the present invention has reinforcing properties and elasticity in the base fabric, so that the tensile force in the width direction of the liner is reduced due to meandering when unvulcanized rubber is wound. Even if the rubber member becomes uneven, distortion is absorbed and wrinkles are prevented from occurring, and even if there is a difference in the thickness of the rubber member, it follows this difference and has the effect of uniformly contacting the rubber member in the width direction.

For the elastomer layer to be bonded to both sides or one side of the base fabric, a rubber material that can expand and contract following the expansion and contraction of the base fabric is appropriately selected, which prevents wrinkles on the winding liner and ensures uniform contact with the rubber member. Furthermore, since the surface is smooth, there are no liner threads (unevenness), and as a result, the rubber member surface is sealed and a decrease in tackiness is prevented.

The second take-up liner of the present invention completely accommodates the convex portion (protrusion) of the thickness difference in the width direction of the unvulcanized rubber member inside using the soft foam, eliminating the difference in outer and inner diameters in the width direction of the roll. The member acts to uniformly contact the liner in the width direction.

As a result, this winding liner has a thread pattern (unevenness).
The elastomer layer or sheet layer, which has a smooth surface without any blemishes, contacts the unvulcanized rubber member uniformly in the width direction and seals the surface, preventing blooming (precipitation of compounded chemicals, oil, etc.) on the rubber surface of the unvulcanized rubber member. ) is suppressed, and the liner threads (irregularities) are suppressed in the rubber member.
Since no is formed, deterioration in tackiness due to winding is also suppressed. In addition, since winding pressure is applied uniformly to the unvulcanized rubber member in the width direction, there is no change in the thickness of the rubber member due to crushing, and the shrinkage rate of the unvulcanized rubber member in the width direction during storage after being rolled up. There is no difference in the quality of the product, and there is no bending (short side) of the member when it is unrolled during the use process.

Further, such a take-up liner requires that the elastomer layer bonded to both or one side of the soft foam has a predetermined extensibility. This is because when the liner is wound to a predetermined winding diameter, tensile force is generated on the outer diameter side (outside) of the liner and compressive force is generated on the inner diameter side (inside) due to bending. This is to prevent me from deviating.

This necessary elongation rate will be specifically explained below.

Said type (1) of the second take-up liner of the present invention
) and (2), when they are wound up and unwound, a compressive force acts on the inside and a tensile force acts on the outside, as shown in FIG. When strain is calculated based on this figure, the amount of strain (ε) is obtained by the following formula.

(In the formula, R is the bending radius, and y is the distance from the center of the liner to the liner surface.) Here, the thickness of the liner varies depending on the rubber member to be wound, and it is preferable that the liner thickness is equal to or greater than the thickness of the rubber member. The most frequently used liner thickness is 5m.
This lychee is generally rolled up as shown in Figure 10. In this figure, the minimum diameter of the guide roll lO is 25nunφ, so if the thickness of the liner is 5mm, the tensile strain (ε) applied to the outside of the liner will be 20% when calculated from (1) 2 above. . Therefore, in order to effectively prevent the occurrence of wrinkles in the winding liners of types (1) and (2) in this case, the elongation rate of the outer layer of the liner is required to be 20% or more.

Next, in the type (3) winding liner, a part of the highly rigid inner liner acts as a fulcrum and bending strain is applied, so the tensile strain (ε) applied to the outer side can be calculated by the following formula. Become.

Therefore, the minimum diameter of the guide roll 10 is 2.5 mmφ.
Assuming that the liner thickness is 5M, the tensile strain applied to the outside is calculated from the above formula (II) to be 40%. Therefore, in this case, the elongation rate of the outer layer of the type (3) take-up liner is required to be 40% or more.

From the above, the elongation rate of the elastomer layer of the outer member of the take-up liner is required to be 20% or more for types (1) and (2) and 40% or more for type (3).

The type (1) roll-up liner of the present invention has a highly rigid and non-stretchable reinforcing cloth placed in the center, which serves to uniformly disperse the inner and outer strains caused by bending and to reinforce the liner. and furthermore, as shown in FIG. 11, tension is given in the width direction of the winding liner 12,
Prevents sagging of parts that do not come into contact with the rubber member 13,
It also has the role of preventing wrinkles.

(Example) Next, the present invention will be explained based on Examples and Comparative Examples.

The base fabric is made of stretchable polyester tricot cloth,
A take-up liner was prepared by bonding silicone rubber to both sides using an adhesive (Example 1). Using this liner, an inner liner rubber sheet for a PSRS tire with a squeegee structure was wound up, and after being left for one day, it was unwound and the performance of the wound liner was evaluated.

The evaluation was carried out by measuring the tackiness of the rubber sheet member at three locations: the winding core, the center of the roll, and the outside of the roll, as shown in Figure 12, at the center a and at the ends. went. In addition, the presence or absence of wrinkles was also observed when the winding liner was rolled up.

The results obtained are shown in Table 1.

For comparison, Table 1 shows a polyester plain weave liner (Comparative Example 1) and a liner with a polyester base fabric and polyethylene bonded to both sides (Comparative Example 2) as conventional winding liners. We conducted an evaluation. The results are also shown in Table 1.

Table 1 From Table 1, it can be seen that the take-up liner of the present invention has better tackiness of the unwound rubber member than the conventional liner. Further, the properties of the rubber sheet member were not deteriorated due to liner wrinkles due to meandering of the liner, and workability was also improved compared to conventional liners.

2 to 4f-3 The second take-up liner of the present invention of type (1) is shown in FIG. 13 (Example 2), and as type (2) is shown in FIG. (Example 3)
, and those of type (3) shown in FIG. 15 (Example 4) were prepared.

The reinforcing fabric 14 in the winding liner of type (1) of the present invention shown in FIG. It has high rigidity to serve as reinforcement.

Both sides of this reinforcing cloth 14 are covered with urethane foam 15.
are bonded, and this urethane foam 15
A polyester knitted fabric 16 coated with silicone rubber 17 is bonded to both surfaces of the fabric. This polyester knitted fabric 16 is similar to the fabric of women's stockings and has elasticity, and thermosetting silicone is adhered to this fabric using an adhesive.

Incidentally, since silicone alone lacks strength and adhesive strength, the polyester knitted fabric 16 also has the role of covering this. The urethane foam 15 and the polyester knitted fabric 16 are bonded together by heat fusion.

The take-up liner of type (2) of the present invention shown in FIG. 14 is no different from the type (1) shown in FIG. 13 except that it does not have the reinforcing cloth 14.

The take-up liner of type (3) of the present invention shown in Fig. 15 has increased bending rigidity by using a cloth using polyester monofilament as the warp and weft instead of the elastomer layer on one side of the liner of type (2). Reinforcement sheet 18
are joined together, and silicone rubber 17 is further applied to the surface of this sheet. In this roll-up liner, when the reinforcing sheet 18 is rolled up on the inside, even if bending stress is applied, the sheet with high rigidity will be at the center, and the elongation force will be exerted only on the outside (outer diameter side). Since it is added, there are no wrinkles.

For comparison, a winding liner shown in FIG. 16 was prepared (Comparative Example 3). This take-up liner, like the take-up liner of type (1) of the present invention, has a reinforcing cloth 14 at the center of a foamed urethane foam 15, but a stretchable tricot 19 is provided on both surfaces of the foamed urethane foam 15. It is joined.

Using the winding liners of Examples 2 to 4 and Comparative Example 2, side rubber for PSRS tires with contours was wound up, stored for a period of time, and then unwound during the use process to evaluate the performance of each winding liner. .

Evaluations were made of the tackiness of the outside of the unvulcanized rubber material, the center of the material, and the core of the product, the crushed contours of the material, the amount of bending of the rubber material, and the presence or absence of wrinkles in the liner. Ta. The amount of bending of the rubber member is determined by unwinding the rubber member after storing it for 24 hours.
Cut the contoured rubber member 20 into lengths, place it on a flat plate, apply a ruler 21 to both ends of the contoured rubber member 20, and measure the distance C between the center of the end of the member and the ruler. Obtained by doing.

The results obtained are shown in Table 2.

Table 2 It can be seen from Table 2 that the take-up liners of the present invention all have significantly improved tackiness of the rubber member as compared to the conventional take-up liners.

Furthermore, in the winding liner of the present invention, the amount of bending of the rubber member was reduced, and no liner wrinkles occurred.

(Effects of the Invention) As explained above, the take-up liner of the present invention does not cause wrinkles on the liner and does not deteriorate the properties of the rubber member, and the tackiness of the rolled-out rubber member is also lower than that of the conventional take-up liner. This is a significant improvement compared to the previous model, and the variation in tackiness within the winding has been substantially eliminated, making it possible to achieve stable bonding without applying rubber cement between the rubber members of the tire. As a result, we were able to reduce direct material costs by eliminating the application of rubber cement, and also eliminate defects in color tone of the product due to the protrusion of the applied cement on a portion of the side shoulder. Furthermore, by stabilizing the tackiness of the rubber member, work efficiency during the use process was improved, and the problem of product defects such as air entering between joints due to insufficient joining force of the members could be resolved.

[Brief explanation of the drawing]

FIG. 1 is a partial perspective view of a take-up liner as an example of the present invention. FIG. 2 is a partial perspective view of another example of the take-up liner of the present invention. FIG. 3 is a partial perspective view of a take-up liner as an example of the present invention. - A sectional view of an example take-up liner; Figure 4 is a sectional view of an example take-up liner of type (1-2) of the present invention; Figure 5 is an example of type (2-1) of the present invention. FIG. 6 is a sectional view of a take-up liner of the type (2-2) of the present invention; FIG. 7 is a take-up liner of the type (3-1) of the present invention; Figure 8 is a cross-sectional view of a take-up liner of the type (3-2) of the present invention; Figure 9 shows the tensile force acting on the outside and the pull force acting on the inside when the take-up liner is wound up. FIG. 10 is an explanatory diagram showing the state of the compressive force. FIG. 10 is an explanatory diagram showing how the take-up liner and the rubber member are wound up. FIG. 11 is an example of the present invention in which the rubber member is wound up with the take-up liner. FIG. 12 is a cross-sectional view of the rubber member showing the locations where the cookness of the rubber member is measured. FIG. 13 is an example of the type (1) of the present invention used in Example 2. FIG. 14 is a cross-sectional view of an example winding liner of type (2) of the present invention used in Example 3, and FIG. 15 is a cross-sectional view of the type (3) of the present invention used in Example 4. FIG. 16 is a sectional view of a conventional take-up liner, FIG. 17 is an explanatory diagram showing a method for measuring the amount of bending of a contoured rubber member, and FIG. 18 is a squeegee rubber member. 1 is a cross-sectional view of a cut cochoid cord with a coating. l... Base fabric 2... Elastomer layer 3
...Highly rigid, non-stretchable cloth (reinforcing cloth) 4...Soft foam 5...Film-like elastomer 6...Stretchable cloth 7...Highly rigid, non-stretchable sheet 8...Outside
9...Inside 10...Guide roll
11... Rubber member 12... Winding liner 1
3... Rubber member 14... Reinforcement cloth 15... Urethane foam 16... Polyester knitted fabric 17... Silicone rubber 18... Reinforcement sheet 19... Tricot 20... Contoured rubber Member 21... Ruler 22... Squeegee rubber 23... Coachite code Patent applicant Brideston Co., Ltd. Patent attorney Akihide Sugimura Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 7'/ Figure 9＼ Figure 10 Figure 11 Figure 12

Claims (1)

[Claims] 1. In a take-up liner for winding up an unvulcanized rubber member between the two sides, a stretchable and elastic elastomer layer with a smooth surface is provided on both sides or one side of a long strip-shaped base fabric that has stretchability. A winding liner characterized by being joined to. 2. A take-up liner for winding up an unvulcanized rubber member sandwiching the unvulcanized rubber member is a laminate in which a stretchable elastomer layer is bonded to both sides or one side of a long strip-shaped soft foam, and at least A winding liner for an unvulcanized rubber member, characterized in that one surface has a smooth surface.